Regulator for dynamo-electric machines.



No. 639,957. Patented Dec. 26, I899. R. E. BALL.

REGULATOR FOR DYNAMO ELECTRIC MACHINES.

(Application filed Feb. 13. 11599.

(No Model.)

N m r WITNESSES: lNVENTOR ATTORNEYS MQQQ-K Q. 7% 79% 7 UNITED STATES PATENT OFFICE.

ROYAL E. BALL, OF NEW YORK, N. Y., ASSIGNOR TO THE BALL ELECTRIC COMPANY, OF YONKERS, NEV YORK.

REGULATOR FOR DYNAMO-ELECTRIC MACHINES.

SPECIFICATION forming part of Letters Patent N 0. 639,957, dated December 26, 1899. Application filed February 13,1899. Serial No. 705,385. (No model.)

To aZZ whom it may concern.-

Be it known that I, ROYAL E. BALL, a citizen of the United States, residing at New York city, borough of Manhattan, countyand State of New York, have invented certain new and useful Improvements in Regulators for Dynamo-Electric Machines, of which the following is such a full, clear, and exact description as will enable any one skilled in the art to to which it appertains to make and use the same, reference being had to the accompanying drawings, forming part of this specification.

My invention relates to means for automatically regulating dynamo electric mar5 chines, and it is particularly applicable to the type of regulator set forth in United States Letters Patent No. 444,587 granted to me January 13, 1891, and in which a movable part of the magnetic circuit of the machine is utilized to automatically shift the brushes to vary the pressure or volume of current.

I have illustrated a type of my invention in the accompanying drawings, wherein-- Figure 1 is a side view of a dynamo-electric c 5 machine embodying my invention, the righthand end of the machine being partly broken away and partly in vertical section. Fig. 2

is avertical transverse section on a plane indicated byline 2 2, Fig. 1.

Referring to the drawings, in which like letters and numbers of reference indicate like parts throughout, 6 is the armature-shaft, mounted in the end pieces 7 of the machineframe and carrying the armature 8 and the I commutator-cylinder 9.

l'Ois a circular magnetic plate or disk provided with a central opening 11, by which it is mounted on an inwardly-extending tubular hearing or extension 12 of the frame 7. The

no magnetic body lO is set in a recess 13, formed in the inner'fam of the frame 7, and turns about the same'axis as the shaft 6, which extends through the tubular bearing 12, on which the body turns. This magnetic body 10 forms a partof the magnetic circuit of the machine and serves as a regulator upon the principle pointed out in my patent hereinbefore referred to-namely, that if a movable magnetic body be included within a magnetic 5o circuit it will tend to place itself so that its axis of least resistance will become parallel to the resultant magnetic line traversing the magnetic circuit and that the force with which it will tend to take this position will be dependent upon the number of magnetic lines of force passing through it. To obtain the axes of different resistances, I cut away a portion 14 of the body, such cu t-away portion being in the form of a Wide groove extending diametricallyacrosstheinnerfaceoftheplate. This gives to the body twoaxes a b and c d at right angles to each other and of different resistances. The axis a I), being parallel with the cut-away portion, constitutes the axis of least resistance. Since the body 10is magnetic and forms aportion of the magnetic circuit of the machine, it will tend to move so as to place its axis of least resistance namely, the axis a b-parallel to the axis of the magnetic circuit of the machine, which is vertical, in ac- 7o cordance with the principle above referred to, and this tendency of force to move the body bears a relation to the strength of magnetic current. I utilize this automatic movement of the magnetic body 10 as a regulating means for the machine by connecting the body with the yoke 15, which is mounted on bearing 12 and is provided with the brushes 16. The magnetic body and the yoke are connected through means and mechanism whereby the angular movement of the magnetic body is imparted to the yoke with multiplied effect and the yoke is given a long range of move ment. In the present instance the mechanism for multiplying the movement is constructed as follows: A stud 22, fixed upon the machine-frame 7, carries a loose sleeve 23, which rocks thereon. From one side of the sleeve project two fixed arms 24 and 25, the latter being three times the length of the former and both extending at right angles to the sleeve and in the same direction. A link 26 is connected to pins 27 and 28 on the short arm and the magnetic body, respectively, so that the angular movement of the body is 5 imparted to the rock sleeve or shaft 23. A link 29 is connected loosely to pins 30 and 31, mounted on the long arm 25 and the yoke 15, respectively, so that the motion of the sleeve 23 is transmitted to the yoke and causes it to shift 011 its axis angular-1y. The proportional lengths of the arms 23 and 25 being as one to three, if now the diameters of the yoke and the magnetic body 10 be as one to two the angular movement imparted to the yoke from the magnetic body will be six times as great as that of the body. In this way I am onabled to give a long range of angular movement to the yoke and to greatly exaggerate its movement compared with that of the mag netic body. For example, with the proportion of parts just described an angular movement of the body of, say, ten degrees will cause the yoke to move angularly sixty degrees. As the axis of least resistance a Z) of the magnetic body moves toward the vertical the brushes are shifted accordingly to maintain the requisite lead.

In this construction I use a counterbalancing-weight 18 on the magnetic body 10. I also provide the rock shaft or sleeve 23 with an adjustable weight 32, which is formed with a screw-threaded socket working on a screwthreaded stem 33, which projects from the sleeve 23 in an opposite direction from the arms 24.- and 25. By adjusting the weight 32 the counterbalancing is effected more accurately and the mechanism made more sensitive.

The range of angular movement of the magnetic body or disk 10 is limited in each direction by means of a slot 3%, formed in the periphery of the disk, and screw 35, projecting from the wall of the recess 13 into said slot. The length of the slot 34 for limiting the angular throw of the magnetic disk 10 is shown as about ten degrees plus the thickness of the screw 35, which projects therein, and l find that this is sufficient to give the yoke the necessary range of movement.

I do not limit myself to the specific constructions herein set forth, as various modifications may be made in the several parts of the device without departing from the spirit of my invention.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

1. The combination of a dynamo-electric machine provided with a brush-carryin g yoke, an automatically movable magnetic body forming part of the magnetic circuit of said machine and movement-multiplying connections between said magnetic body and yoke for actuating the yoke with multiplied move ment, substantially as and for the purpose set forth.

2. The combination of a dynamo-electric machine, a movable bruslrcarrying yoke, a movable magnetic body forming part of the magnetic circuit of said machine and mounted concentrically with said yoke, and connections between said magnetic body and the yoke for causing the movement of the body to be imparted to the yoke with an increased range of movement, substantially as and for the purpose set forth.

3. The combination of a dynamo-electric machine, a bruslrcarrying yoke mounted concentrically with the shaft of the machine, a movable magnetic part of said machine mounted concentrically with said yoke, a rock shaft or sleeve provided with two laterallyprojecting arms of different lengths, a link connecting the short arm with the movable magnetic part, and a link connecting the long arm with said yoke, whereby the angular movement of the magnetic part on its axis mayimpart to the said yoke an increased angular movement, substantially as and for the purpose set forth.

4. The combination of a dynamo-electric machine, a brush-carrying yoke mounted concentrically with the shaft of the machine, a movable magnetic disk mounted concentrically with said yoke and having a greater diameter than the yoke, a rock shaft or sleeve provided with two laterally-projecting arms of unequal length, a link connecting the short arm with said magnetic disk, and a link connecting the long arm with the said yoke, whereby the angular movement of the disk may be imparted to the yoke with an increased range of angular movement, substantially as and for the purpose set forth.

5. The combination of a dynamo-electric machine, a brush-carryin g yoke mounted concentrically with the shaft of the machine, a movable magnetic part of said machine mounted concentrically with said yoke, a rock shaft or sleeve provided with two laterallyprojectiug arms of different lengths, a link connecting the short arm with the movable magnetic part, a link connecting the long arm with said yoke, and a counterweight mounted upon said movable magnetic part, substantially as and for the purpose set forth.

6. The combination of a dynamo-electric machine, a brush-carrying yoke mounted concentrically with the shaft of the machine, a movable magnetic part of said machine mounted concentrically with said yoke, a rock shaft or sleeve provided with two laterallyprojecting arms of different lengths, a link connecting the short arm with the movable magnetic part, a link connecting the long arm with said yoke, and an adjustable weight mounted upon said rock shaft or sleeve opposite the point where said arms are located, substantially as and for the purpose set forth.

In testimony whereof I have hereunto set my hand, this 9th day of February, 1899, in presence of the two subscribing witnesses.

ROYAL E. BALI Witnesses:

OARsoN Q. AROHIBALI), ROBERT P. BARNES. 

